/*
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 */
package com.mycompany.calculator2;

/**
 *
 * @author Administrator
 */
public class calculator2 {
    
    private double value;
    
    public void ac(){
    
        value = 0;
        
    }
    
    public void add(double number){
    
        value += number;
        
    }
    
    public void substract(double number){
        System.out.println("num:"+number +"value:"+value);
        if(value==0){
            value = number;
        }else{
            value -= number;
        }
        
    }
    
    public void multiply(double number){
    
        value *= number;
        
    }
    
    public void divide(double number){
    
        try{
            value /= number;
        }catch(Exception e){
            //IODO
        }
        
    }
    public double getValue()
    {
        return value;
    }
    
    public static void main(String[] arg){
        calculator2 calculator = new calculator2();
        calculator.add(10);
        calculator.substract(1);
        calculator.multiply(2);
        calculator.divide(2);
        System.out.println(calculator.getValue());
        calculator.ac();
        System.out.println(calculator.getValue());
    }

}

